American Board of Opticianry (ABO) Practice Test

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Prepare for the ABO (American Board of Opticianry) Test with interactive flashcards and hundreds of multiple choice questions. Updated for 2024 to help you excel on exam day

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Which refractive error do most children tend to shift towards as they grow?

Defined as grams per cubic centimeter
Applied to the back of the lens with the ridged side out
Most children are born hyperopic
A minus lens moved further away from the eye has is compensated with

The correct answer is: A minus lens moved further away from the eye has is compensated with

As children grow, their eyes tend to shift towards myopia, which is when distant objects appear blurry. This happens because the eyeball may become longer than normal or the cornea may be too curved. To correct myopia, a minus lens is used. When a minus lens is moved further away from the eye, it needs to be compensated with additional power to maintain the same level of correction. This concept is essential for opticians to understand when prescribing glasses for children with myopia. Option A is incorrect because it refers to density, which is not related to refractive error in children. Option B is incorrect as it describes a specific way to apply a lens, which is not relevant to how refractive error changes in children. Option C is incorrect because most children are not born hyperopic; in fact, hyperopia is less common in children compared to myopia.